/* CSS Custom Properties for Theming */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #2c3e50;
  --text-secondary: #666666;
  --text-muted: #95a5a6;
  --accent-primary: #3498db;
  --accent-secondary: #2980b9;
  --accent-tertiary: rgba(52, 152, 219, 0.1);
  --border-color: #e9ecef;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.15);
  --navbar-bg: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #2d2d2d;
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  --accent-primary: #e74c3c;
  --accent-secondary: #c0392b;
  --accent-tertiary: rgba(231, 76, 60, 0.1);
  --border-color: #3a3a3a;
  --shadow-light: rgba(0, 0, 0, 0.2);
  --shadow-medium: rgba(0, 0, 0, 0.3);
  --shadow-heavy: rgba(0, 0, 0, 0.4);
  --navbar-bg: rgba(26, 26, 26, 0.95);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--navbar-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo a {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--accent-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  width: 44px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-secondary);
  position: relative;
  padding: 2px;
}

.theme-toggle:hover {
  background: var(--accent-tertiary);
  border-color: var(--accent-primary);
}

.theme-toggle-icon {
  width: 18px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 50%;
  position: absolute;
  left: 2px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 10px;
}

[data-theme="dark"] .theme-toggle-icon {
  left: 22px;
}

.sun-icon, .moon-icon {
  position: absolute;
  transition: all 0.3s ease;
}

.sun-icon {
  opacity: 1;
  transform: scale(1);
}

.moon-icon {
  opacity: 0;
  transform: scale(0);
}

[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: scale(0);
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: scale(1);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 600px;
}

.hero-greeting {
  display: block;
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 400;
}

.hero-name {
  display: block;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.875rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 12px var(--accent-tertiary);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-tertiary);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-primary);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-placeholder {
  width: 300px;
  height: 300px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  color: var(--text-muted);
  border: 4px solid var(--border-color);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.scroll-indicator:hover {
  color: var(--accent-primary);
  transform: translateX(-50%) translateY(-5px);
}

.scroll-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
  transition: color 0.3s ease;
}

.scroll-arrow {
  font-size: 1.2rem;
  color: var(--accent-primary);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* Section Titles */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

/* About Section */
.about {
  padding: 100px 0;
  background: var(--bg-primary);
}

/* About Navigation Tabs */
.about-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.about-tab {
  padding: 0.75rem 2rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.about-tab:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.about-tab.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

/* About Content Wrapper */
.about-content-wrapper {
  position: relative;
  overflow: hidden;
}

.about-content-slider {
  display: flex;
  transition: transform 0.5s ease;
}

.about-panel {
  min-width: 100%;
  opacity: 0;
  transform: translateX(20px);
  transition: all 0.5s ease;
}

.about-panel.active {
  opacity: 1;
  transform: translateX(0);
}

.about-panel-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h3 {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

/* Journey Timeline */
.journey-timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.timeline-point {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.timeline-point:hover {
  background: var(--accent-tertiary);
  transform: translateX(10px);
}

.timeline-point .year {
  font-weight: 600;
  color: var(--accent-primary);
  font-size: 1.1rem;
  min-width: 60px;
}

.timeline-point .event {
  color: var(--text-primary);
  font-weight: 500;
}

/* Drive Principles */
.drive-principles {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.principle {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  transition: all 0.3s ease;
  flex: 1;
}

.principle:hover {
  background: var(--accent-tertiary);
  transform: translateY(-5px);
}

.principle i {
  font-size: 2rem;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.principle span {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.principle small {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Impact Metrics */
.impact-metrics {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.metric {
  text-align: center;
  padding: 2rem 1rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  transition: all 0.3s ease;
  flex: 1;
}

.metric:hover {
  background: var(--accent-tertiary);
  transform: translateY(-5px);
}

.metric-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.metric-detail {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* About Visual */
.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.story-illustration,
.drive-illustration,
.impact-illustration {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  transform: perspective(1000px) rotateY(-15deg);
  transition: all 0.3s ease;
}

.story-illustration:hover,
.drive-illustration:hover,
.impact-illustration:hover {
  transform: perspective(1000px) rotateY(0deg) scale(1.05);
}

.story-illustration i,
.drive-illustration i,
.impact-illustration i {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.visual-text {
  text-align: center;
}

.visual-text span {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
}

.visual-text small {
  display: block;
  opacity: 0.9;
  font-size: 0.9rem;
}

/* Technical Expertise Section - Skill Cloud Design */
.technical-expertise-section {
  margin-top: 4rem;
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

/* Header Styling */
.expertise-header {
  text-align: center;
  margin-bottom: 3rem;
}

.expertise-header h3 {
  font-size: 2.5rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 700;
  position: relative;
}

.expertise-header h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
}

.expertise-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Skills Cloud Layout */
.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

/* Unified Skill Tag Styling */
.skill-tag {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: default;
}

/* Expert Level - Main accent color */
.skill-tag.expert {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  font-weight: 600;
}

/* Advanced Level - Lighter accent */
.skill-tag.advanced {
  background: var(--accent-tertiary);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  font-weight: 500;
}

/* Intermediate Level - Neutral */
.skill-tag.intermediate {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-color: var(--border-color);
  font-weight: 400;
}

/* Hover Effects */
.skill-tag:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--shadow-medium);
}

.skill-tag.expert:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
}

.skill-tag.advanced:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.skill-tag.intermediate:hover {
  background: var(--accent-tertiary);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Remove category-specific colors */
.skill-tag[data-category="language"],
.skill-tag[data-category="ai"],
.skill-tag[data-category="robotics"],
.skill-tag[data-category="tools"],
.skill-tag[data-category="web"],
.skill-tag[data-category="specialized"] {
  /* No additional styling - unified approach */
}

/* Skills Legend */
.skills-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot.expert {
  background: var(--accent-primary);
}

.legend-dot.advanced {
  background: var(--accent-tertiary);
  border: 2px solid var(--accent-primary);
}

.legend-dot.intermediate {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .technical-expertise-section {
    padding: 3rem 0;
  }

  .expertise-header h3 {
    font-size: 2rem;
  }

  .expertise-subtitle {
    font-size: 1rem;
    padding: 0 1rem;
  }

  .skills-cloud {
    gap: 0.75rem;
    padding: 0 1rem;
  }

  .skill-tag {
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
  }

  .skills-legend {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .expertise-header h3 {
    font-size: 1.75rem;
  }

  .skills-cloud {
    gap: 0.5rem;
  }

  .skill-tag {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
  }

  .skills-legend {
    gap: 0.75rem;
  }
}

/* Animation for skill tags */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.skill-tag {
  animation: fadeInUp 0.6s ease forwards;
}

/* Staggered animation delays */
.skill-tag:nth-child(1) { animation-delay: 0.1s; }
.skill-tag:nth-child(2) { animation-delay: 0.15s; }
.skill-tag:nth-child(3) { animation-delay: 0.2s; }
.skill-tag:nth-child(4) { animation-delay: 0.25s; }
.skill-tag:nth-child(5) { animation-delay: 0.3s; }
.skill-tag:nth-child(6) { animation-delay: 0.35s; }
.skill-tag:nth-child(7) { animation-delay: 0.4s; }
.skill-tag:nth-child(8) { animation-delay: 0.45s; }
.skill-tag:nth-child(9) { animation-delay: 0.5s; }
.skill-tag:nth-child(10) { animation-delay: 0.55s; }

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .skill-tag {
    animation: none;
  }

  .skill-tag:hover {
    transform: none;
  }

  .skill-tag::before {
    display: none;
  }
}

/* Experience Section */
.experience {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.timeline-container {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  display: flex;
  align-items: center;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.timeline-icon {
  width: 60px;
  height: 60px;
  background: var(--accent-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  border: 4px solid var(--bg-primary);
  transition: all 0.3s ease;
}

.timeline-icon::before {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border: 2px solid var(--accent-tertiary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.timeline-item:hover .timeline-icon {
  background: var(--accent-secondary);
  transform: scale(1.1);
}

.timeline-item:hover .timeline-icon::before {
  border-color: var(--accent-primary);
}

.timeline-content {
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px var(--shadow-light);
  width: calc(50% - 40px);
  position: relative;
  transition: all 0.3s ease;
}

.timeline-content::before {
  content: '';
  position: absolute;
  top: 50%;
  width: 0;
  height: 0;
  border: 15px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
  right: -30px;
  border-left-color: var(--bg-primary);
  transform: translateY(-50%);
}

.timeline-item:nth-child(even) .timeline-content::before {
  left: -30px;
  border-right-color: var(--bg-primary);
  transform: translateY(-50%);
}

.timeline-item:hover .timeline-content {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px var(--shadow-medium);
}

.timeline-item:hover .timeline-content::before {
  border-left-color: var(--bg-primary);
  border-right-color: var(--bg-primary);
}

.timeline-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--accent-tertiary);
  color: var(--accent-primary);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.timeline-badge.current {
  background: var(--accent-primary);
  color: white;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.timeline-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-title {
  font-size: 1.4rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
}

.timeline-item:hover .timeline-title {
  color: var(--accent-primary);
}

.timeline-company {
  font-size: 1.1rem;
  color: var(--accent-primary);
  font-weight: 500;
  margin-bottom: 1rem;
}

.timeline-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.timeline-achievements {
  margin-bottom: 1.5rem;
}

.achievement-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.achievement-item:hover {
  background: var(--bg-secondary);
  transform: translateX(5px);
}

.achievement-item i {
  color: var(--accent-primary);
  font-size: 1rem;
  width: 16px;
}

.achievement-item span {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}

.timeline-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  padding: 0.25rem 0.75rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.skill-tag:hover {
  background: var(--accent-tertiary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Achievements Section - Infinite Scrolling Carousel */
.achievements {
  padding: 6rem 0;
  background: var(--bg-primary);
}

.carousel-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 4rem;
  overflow: hidden;
  cursor: grab;
  user-select: none;
}

.carousel-container:active {
  cursor: grabbing;
}

.carousel-container:hover {
  background: linear-gradient(135deg, transparent 0%, var(--bg-secondary) 2%, transparent 4%);
}

.carousel-track-container {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: transparent;
  pointer-events: auto;
}

.carousel-track {
  display: flex;
  gap: 2rem;
  will-change: transform;
  backface-visibility: hidden;
  perspective: 1000px;
}

.carousel-track.wheel-scrolling {
  transition: none;
}

.achievement-card {
  flex: 0 0 280px;
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  user-select: none;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.achievement-card:hover {
  transform: translateY(-8px) translateZ(0);
  box-shadow: 0 12px 40px var(--shadow-medium);
  border-color: var(--accent-primary);
}

.achievement-card.cloned {
  opacity: 1;
}

.achievement-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  transition: all 0.3s ease;
}

.achievement-card:hover .achievement-icon {
  transform: scale(1.1) rotate(10deg);
  box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.achievement-card h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.achievement-year {
  font-size: 0.9rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.achievement-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
  color: var(--text-primary);
  font-size: 1.1rem;
  box-shadow: 0 4px 15px var(--shadow-light);
  opacity: 0.8;
}

.carousel-nav:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px var(--shadow-medium);
  opacity: 1;
}

.carousel-nav:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel-nav.prev {
  left: 1rem;
}

.carousel-nav.next {
  right: 1rem;
}

.carousel-container:hover .carousel-nav {
  opacity: 1;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  opacity: 0.6;
}

.carousel-dot:hover {
  background: var(--accent-tertiary);
  transform: scale(1.2);
  opacity: 0.8;
}

.carousel-dot.active {
  background: var(--accent-primary);
  transform: scale(1.3);
  opacity: 1;
}

.carousel-dot.active::after {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border: 2px solid var(--accent-tertiary);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.5);
  }
}

.carousel-container::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--accent-tertiary) 45%, var(--accent-primary) 50%, var(--accent-tertiary) 55%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.carousel-container:hover::before {
  opacity: 0.3;
  animation: scrollHint 2s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% {
    transform: translate(-50%, -50%) scaleX(0.8);
    opacity: 0.2;
  }
  50% {
    transform: translate(-50%, -50%) scaleX(1.2);
    opacity: 0.4;
  }
}

.loading-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .carousel-container {
    padding: 1rem 3rem;
  }
  
  .achievement-card {
    flex: 0 0 250px;
    padding: 1.5rem;
  }
  
  .carousel-nav {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .carousel-nav.prev {
    left: 0.5rem;
  }
  
  .carousel-nav.next {
    right: 0.5rem;
  }
  
  .achievement-icon {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }
  
  .achievement-card h3 {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .carousel-container {
    padding: 1rem 2.5rem;
  }
  
  .achievement-card {
    flex: 0 0 220px;
    padding: 1.25rem;
  }
  
  .carousel-track {
    gap: 1.5rem;
  }
  
  .carousel-indicators {
    margin-top: 1.5rem;
  }
  
  .carousel-dot {
    width: 10px;
    height: 10px;
  }
}

.carousel-track-container {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

.achievement-card {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Projects Section */
.projects {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.project-card {
  background: var(--bg-primary);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px var(--shadow-medium);
  border-color: var(--accent-primary);
}

.project-image {
  height: 200px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-image i {
  font-size: 3rem;
  color: var(--text-muted);
}

.project-content {
  padding: 2rem;
}

.project-content h3 {
  font-size: 1.4rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.project-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  padding: 0.25rem 0.75rem;
  background: var(--accent-tertiary);
  color: var(--accent-primary);
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.project-link:hover {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Contact Section */
.contact {
  padding: 100px 0;
  background: var(--bg-primary);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 600;
}

.contact-info p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  transition: all 0.3s ease;
}

.contact-method:hover {
  background: var(--accent-tertiary);
  transform: translateX(10px);
}

.contact-method i {
  font-size: 1.2rem;
  color: var(--accent-primary);
  width: 20px;
}

.contact-method a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}

.contact-form {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: 12px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-tertiary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-3px);
}